Question

Please help. Write an explicit rule for the n th term of the sequence. 125, 75, 45, 27,…. an= ?

Answer 1

Answer:

$a_n=125+(n-1){3\over{5}}$

Step-by-step explanation:

125

75=125*3/5

45=75*3/5

27=45*3/5

$a_n=a_1+(n-1)r\\\\a_n=125+(n-1){3\over{5}}$